City logistics is a field that studies the best solutions for urban freight distribution with high environmental objectives. However, most actions are started by public authorities without taking into account the impacts of the new organizational schemas in the existing distribution enterprises' organization. This paper sets out to show how city logistics approaches can meet the goals of Sustainable Development nowadays. In order to define the notion of sustainable city logistics, we define the main aspects of each sphere of sustainable development, respectively economic, environmental and societal, i.e. both social and contextual. The main aspects of each sphere are described in order to unify the concept of sustainability related to city logistics. Then, we present the successful experience of Cityporto, the urban delivery service for the city of Padova (Italy), started in 2004 that uses low-pollution lorries. So, the service is considered as less polluting as a conventional approach, and is allowed to enter the city centre (including the Limited Traffic Zone) without hour limitations. This is based on the findings from an exploratory qualitative approach, based on first a documentary analysis then a case study research from several interviews that involved three internal stakeholders of Interporto di Padova (the company which manages the intermodal platform of Padova, in charge of Cityporto) and one member of Padova's Municipality (which promote the project). The results of this case study show that environmental aspect is one of the foundations of the project, but the economic continuity has to be first ensured. Indeed, the preservation of this service on the long term is subjected to its solvency. Moreover, its success is associated to the recognition by employees and customers. With regard to the collected information, it is possible to propose a balanced scorecard, where three axes emerged in connexion with economic, environmental and social dimensions. From this qualitative analysis, a discussion about the sustainability of city logistics solutions is made as conclusion The paper makes a contribution to the evaluation and measurement of city urban logistics using a success story that has been developed from the practitioner perspective. This experience could provide a basis for further practices in Italy and other European countries. Moreover, the relations between city logistics solutions and sustainability are conceptualised and illustrated by a case study, highlighting the main elements for sustainable performance identification and evaluation in this field. In conclusion, the proposed case study is presented for its academic, policy and managerial implications. This experience conceptualises city logistics in relation with the Sustainable Development, setting the main objectives and steps of urban planning for freight distribution and logistics issues. But above all, it provides an understanding of the key success factors in a sustainable urban distribution organisation that can become a pivotal position in the upstream supply chain. De facto, the study should facilitate the implementation of sustainable city logistics policies and practical issues taking into account the importance of the project's economic continuity.
